There is at least one pic of a corroded/eroded EK nickel block despite glycol, 4 corrosion inhibitors, and non-conductive distilled (feser one) which is similar to Thermochill EC6.

If your nickel block has pores, so you have direct nickel/copper contact, you will get corrosion over time, just more slowly with corrosion inhibitors.

Bottom line, no one knows for sure in any individual case. But brave souls like you will let us know in a few months the prevalence/severity of EK nickel failure despite corrosion inhibitors/following EK advice.Edited by opt33 - 6/9/11 at 4:43pm